tartrazine/lexers/io.xml

<lexer>
  <config>
    <name>Io</name>
    <alias>io</alias>
    <filename>*.io</filename>
    <mime_type>text/x-iosrc</mime_type>
  </config>
  <rules>
    <state name="root">
      <rule pattern="\n">
        <token type="Text"/>
      </rule>
      <rule pattern="\s+">
        <token type="Text"/>
      </rule>
      <rule pattern="//(.*?)\n">
        <token type="CommentSingle"/>
      </rule>
      <rule pattern="#(.*?)\n">
        <token type="CommentSingle"/>
      </rule>
      <rule pattern="/(\\\n)?[*](.|\n)*?[*](\\\n)?/">
        <token type="CommentMultiline"/>
      </rule>
      <rule pattern="/\+">
        <token type="CommentMultiline"/>
        <push state="nestedcomment"/>
      </rule>
      <rule pattern="&#34;(\\\\|\\&#34;|[^&#34;])*&#34;">
        <token type="LiteralString"/>
      </rule>
      <rule pattern="::=|:=|=|\(|\)|;|,|\*|-|\+|&gt;|&lt;|@|!|/|\||\^|\.|%|&amp;|\[|\]|\{|\}">
        <token type="Operator"/>
      </rule>
      <rule pattern="(clone|do|doFile|doString|method|for|if|else|elseif|then)\b">
        <token type="Keyword"/>
      </rule>
      <rule pattern="(nil|false|true)\b">
        <token type="NameConstant"/>
      </rule>
      <rule pattern="(Object|list|List|Map|args|Sequence|Coroutine|File)\b">
        <token type="NameBuiltin"/>
      </rule>
      <rule pattern="[a-zA-Z_]\w*">
        <token type="Name"/>
      </rule>
      <rule pattern="(\d+\.?\d*|\d*\.\d+)([eE][+-]?[0-9]+)?">
        <token type="LiteralNumberFloat"/>
      </rule>
      <rule pattern="\d+">
        <token type="LiteralNumberInteger"/>
      </rule>
    </state>
    <state name="nestedcomment">
      <rule pattern="[^+/]+">
        <token type="CommentMultiline"/>
      </rule>
      <rule pattern="/\+">
        <token type="CommentMultiline"/>
        <push/>
      </rule>
      <rule pattern="\+/">
        <token type="CommentMultiline"/>
        <pop depth="1"/>
      </rule>
      <rule pattern="[+/]">
        <token type="CommentMultiline"/>
      </rule>
    </state>
  </rules>
</lexer>